... delivery with the perfect packing; 3. regularly suppliable Sodium Tripolyphosphate (STPP) specification:Synonyms: triphosphoric acid pentasodium salt, pentasodium triphosphate, tripolyphosphate pentasodium ... , sodium triphosphate, STPP, armofos, empiphos stp-D, freez-gard FP 19, polygon, rhodiaphos ...